Electrolytic production of permanganates.



B'. F. L'o'vl'vn c. E. LANNING III w. I.. IUDEFIND. ELECTROLY'TIC PRODUCTION .0F PERMNGANM'ES.

APPLICATION FILED I/\N.2Ir I9I8. 1,291,682,

Patented Jan. 14, 1919.

i tungsten may UNITED sTATEs PATENT OFFICE,

BENJAMIN E. LovELAcE, CHARLES E. LANNING, AND WILLIAM LEE JUDEEIND, or

BALTIMORE, MARYLAND.

ELECTBOLYTIC PRODUCTION 0F PERMANGANATES.

Specification of Letters Patent.

l Patented Jan. 14, 1919.I

Application led January 21, 1918. Serial llo. 218,094.

To all'whom it may concern:

Be 1t known that we, BENJAMIN F. LOVE- LAoE, CHARLES E. LANNING, and WILLIAM ,LEE JUDEFIND, citizens of the United States,

and residents of the city of Baltimore, State of Maryland, and employees of the United States Bureau of Mines, have invented certain new and useful Improvements in the Electrolytic Production of Permanganates. of which the following is a full, clear, and exact description.

This application is made under the act of March 3, 1883, c. 143 (U. S. Stat., 22, p. 625) and the discoveries described herein, 1f patented, may be used by the Government, or any of its officers or employees in prosecution of Work for the Government, or by any other person in the United States, without the payment to them of any royalty thereon.

This invention relates to the art of making ermanganates and particularly to a process or the electrolytic production of various perman anates.

The o ject -of this invention is to produce ina simple and economic manner permanganates ofthe alkali and alkaline earth metals.A

As an example of an apparatus which may be used in practising this process, reference may be had to the accompanying drawing wherein the figure is a vertical section of one ty e of cell.

he electrolytic cell consists oftwo` compartment's, 1 and 2, formed by an outer container, 3, and an Inner vessel, 4, whichis asbestos, and serves as a diaphragm to-pre-v vent passage of the permanganate salt to the outer container. The anodes, 5, are placed in the inner compartment, 2. They contain manganese and one or more of the following elements: silicon, tungsten, molybdenum and carbon, which `may be combined chemlcally or may be uncombined. 'They may be prepared by addin the approprlate amount of one or more o these elements to molten manganese.

As an exam le, '10.parts by weight of e added to 100. parts by weight of molten manganese while the' latter made of porous material such as cement or is in the furnace and the resulting melt cast in suitable shape for use as an anode.

The solution in compartment 2 should be vigorouslyv agitated by the stirrer, 6, during the electrolysis in order continuously to secure uniform distribution of the dissolved substances. anode and cathode compartments may consist of the hydroxid of the metal, the permanganate of which is desired. The carbonate, silicate or other salt which, by hydrolysis, gives an excess of hydroxyl ions in solution may be employed in certain' cases. Fresh electrolyte may be added from time to time to keep up the concentration as may be necessary.

When a large currentis employed the so! lution should be cooled by any appropriate means, not shown.

4manganese or manganese carbid. This is disclosed in German Patent No. 125,060.

In this application we desire to clalm the species of our invention in which the anode The electrolyte used in` both consists of manganese and tungsten which we havel found produces excellent results. In other applications Serial Nos. 213,092 and 213,093 filed concurrently herewith, we claim other species of this invention.

We claim 1. The method of nate which consists 1n electrolyzing a solution of a compound which by hydrolysis 'gives anv alkaline solution, using an anode containing-manganese and tungsten.

2. The method of pre aring a perman anate which consists 1n e ectrolyzing a so upreparing a permanga- Q momen tion of hydroxid using an anode containwhich a diaphragm is placed between the ing manganese and tungsten. anode and Cathode.

3. The method of preparing an alkali 1n testimony whereof We hereunto ax our 1 -permanganate which consists in eleetrolyzsignatures. 5 ing a solution of alkali hydroxid, using an BENJAMIN F. LOVELA-CE. anode containing manganese and tungsten. CHARLES E. LANNNG.

4. The method according to claim 3, in WILLIAM LEE JUDEFIND. 

